package com.ruoyi.web.controller.common;

import com.ruoyi.common.annotation.Anonymous;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;
import com.ruoyi.system.domain.UploadData;
import com.ruoyi.system.service.UploadService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.List;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    /**
     * 图片大小上限10M
     */
    private static final Long MAX_IMAGE_SIZE = 10L * 1024 * 1024;
    /**
     * 视频大小上限120M
     */
    private static final Long MAX_VIDEO_SIZE = 120L * 1024 * 1024;

    @Autowired
    private ServerConfig serverConfig;

    @Autowired
    private UploadService uploadService;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/uploadToOss")
    @Anonymous
    public AjaxResult uploadToOss(@RequestPart(value = "file") MultipartFile multipartFile) {
        try {
            String msg = checkImageSpec(multipartFile);
            if (StringUtils.isNotEmpty(msg)) {
                return AjaxResult.error(msg);
            }
            UploadData uploadData = UploadData.build(multipartFile.getInputStream(), multipartFile.getBytes(), multipartFile.getOriginalFilename(), "0");
            return AjaxResult.success(uploadService.uploadImageToCtYun(uploadData));
        } catch (Exception e) {
            log.error("上传文件失败", e);
            return AjaxResult.error("上传文件失败");
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 校验图片文件大小和后缀名
     *
     * @param file 文件
     */
    private String checkImageSpec(MultipartFile file) {
        log.info("文件大小为：{}，文件名称为：{}", file.getSize(), file.getOriginalFilename());
        //判断格式
        if (!org.springframework.util.StringUtils.hasLength(file.getOriginalFilename())) {
            return "文件名不能为空";
        }
        String fileSuffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));
        if (!IMAGE_SUFFIX_LIST.contains(fileSuffix.toUpperCase())) {
            return "图片格式不正确";
        }

        //判断大小
        if (MAX_IMAGE_SIZE.compareTo(file.getSize()) < 0) {
            return "图片大小上限为10M，已超出";
        }
        return null;
    }

    /**
     * 图片文件后缀列表
     */
    private static final List<String> IMAGE_SUFFIX_LIST = new ArrayList<String>() {{
        add(".JPG");
        add(".PNG");
        add(".JPEG");
    }};

    /**
     * 视频文件后缀列表
     */
    private static final List<String> VIDEO_SUFFIX_LIST = new ArrayList<String>() {{
        add(".mp4");
        add(".mov");
        add(".flv");
        add(".f4v");
    }};
}
